geocontext

export const GPF_WFS_URL = "https://data.geopf.fr/wfs"; import { WfsEndpoint, WfsFeatureTypeBrief, WfsFeatureTypeFull } from "@camptocamp/ogc-client"; import MiniSearch from 'minisearch' export class FeatureTypeNotFoundError extends Error { constructor(name: string) { super(`Type '${name}' not found`); } } export class FeatureTypeSearch { private miniSearch: MiniSearch; constructor(private featureTypes: WfsFeatureTypeBrief[]) { this.miniSearch = new MiniSearch({ idField: 'name', fields: ['name', 'title', 'abstract'], }); this.miniSearch.addAll(this.featureTypes); } search(query: string) { return this.miniSearch.search(query, { boost: { name: 3, title: 2 }, fuzzy: 0.2 }); } } export class WfsClient { private endpoint: WfsEndpoint; private featureTypes: Map<string, WfsFeatureTypeFull> = new Map(); private featureTypeSearch: FeatureTypeSearch; constructor(public baseUrl: string = GPF_WFS_URL) { this.endpoint = new WfsEndpoint(this.baseUrl); } async getFeatureTypes() : Promise<WfsFeatureTypeBrief[]> { await this.endpoint.isReady(); return this.endpoint.getFeatureTypes(); } async searchFeatureTypes(query: string, maxResults: number = 20) : Promise<WfsFeatureTypeBrief[]> { await this.endpoint.isReady(); const featureTypes = await this.endpoint.getFeatureTypes(); if ( ! this.featureTypeSearch ) { this.featureTypeSearch = new FeatureTypeSearch(featureTypes); } const searchResults = this.featureTypeSearch.search(query).slice(0, maxResults); return searchResults.map((result) => { return featureTypes.find((featureType) => featureType.name === result.id); }); } async getFeatureType(name: string): Promise<WfsFeatureTypeFull> { await this.endpoint.isReady(); if ( this.featureTypes.has(name) ) { return this.featureTypes.get(name); } const featureType = await this.endpoint.getFeatureTypeFull(name); if ( ! featureType ) { throw new FeatureTypeNotFoundError(name); } this.featureTypes.set(name, featureType); return featureType; } } export const wfsClient = new WfsClient();